I just got a sidewinder and I found that if I turn my bobbin up-side down to wind it , it works perfect in my machine. I use large cones of thread and so I have a special spindle that my husband made me so I thread the thread thru the machine and have my sidewinder sitting next to the machine and wind it like that. I also have a heavy duty winder I got for my quilting machine that works great. I had to pay $70.00 for it but it is reall fast and good. I have a viking, so that is the maachine that I have to turn the bobbin upside down to wind.